Re: my samsung galaxy ace wont accept any sim?

Ensure your handset is unlocked or locked to the 02 network in order for a giffgaff sim to work. try the sim in another handset. if your handset is locked to another network best bet would be to pop down to your local mobile shop they should be able to unlock for a small fee, for more info follow the link below to the giffgaff unlockapedia.http://giffgaff.com/unlock